The seawater samples Dore and his colleagues have analyzed confirm what the theory predicts.
The effect was particular striking at about 250 meters down, and again at 500 meters. Dore and his colleagues came up with two possible explanations. It could be that surface water picked up CO2 and then moved to those depths. Or there could be a biological explanation.
"It's important to realize that the oceans are really becoming acidic. And it can have negative impacts on a whole variety of sea life from fish to coral. It's potentially catastrophic."
55. What can be the best title of the passage?
A. Sea Life Facing Danger
B. Scientist Researching Seawater
C. Oceans Becoming More Acidic
D. Climate Change Affecting Seawater
56. With the increase of atmospheric CO2,__________.
A. more corals will appear in the seaB. the surface water is becoming warmer
C. the chemical balance of the seawater is affected
D. the PH of the ocean out here has been increasing
57. Which of the following shows the process of the impact of atmospheric CO2 on sea life?
a.Sea life is endangered. b.CO2 goes into the surface water. c.The ocean chemistry is affected. d.CO2decreases the PH and makes the seawater more acidic.
e.CO2 levels in the atmosphere go up.
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